[Feature] Move the server operation to a `start` subcommand

[YourTechBud]

• The server should start only when we run the start command.
• So if the binary built was my-worker, the command to start the worker should be my-worker start
• Consider using Cobra for this.

If you want this feature to be implemented, give it a thumbs up reaction, so that we can determine which features are important to you.
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